Long term fertility studies at Samaru
Subtitle: Nigeria : III. Comparative effectiveness of separate and combined applications of mineral fertilizers and farmyard manure in maintaining soil productivity under continuous cultivation in the savannah..
Contributors: Lombin, G.; Nigeria, Institute for Agricultural Research, Samaru.
Series: Samaru Miscellaneous Paper -- 75.
Publisher: Institute for Agricultural Research, Ahmadu Bello University.
Published: 1978
Place of publication: Zaria
Language: und